As revealed in yesterday’s Sun column, two-faced Chuka Umunna isn’t so shy about the ‘British Obama’ tag when he’s away from the public eye. When the President visited Ireland in the summer of 2011 he delighted his hosts by telling them of his Moneygall ancestral roots and dubbing himself Barry O’Bama. This year it was Chuka’s turn, speaking to guests at the Labour Irish Society’s St Patrick’s Day shindig of a relative from Sligo. Telling them they could call him Chuka O’Munna may have given the game away…